Link http://codepen.io/betdream/pen/frDqh
Link http://www.daihoi12.com/2015/12/gop-y-voi-bo-chinh-tri-va-tong-bi-thu.html
Viet bai nay cho itersdesktop
https://mediannguyen.wordpress.com/2014/03/22/pair-programming-lap-trinh-cap-why-use-it-what-is-it-and-how-to-use/
Link http://broadskyblog.blogspot.com.es/2012/11/over-1000-of-most-common-fixed.html
Xem hướng dẫn ở đây
http://webrocom.net/use-rich-text-editor-tinymce-codeiginiter/